Chidule cha lithiamu batri lithiamu

2022/04/08

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Pofuna kuthetsa vutoli, anthu aphunzira luso la pre-lithiance. Ndi pre-lithiuming ndi elekitirodi zakuthupi, osasinthika lifiyamu imfa chifukwa mapangidwe SEI filimu kuthetsedwa kusintha okwana mphamvu ndi kachulukidwe mphamvu batire. Ine.

Negative polar lithiamu luso ndi wamba pre-lithiuming njira ndi negative lithiamu, monga lithiamu zojambulazo, lithiamu ufa supplement, etc., ndi chisanadze chitukuko chisanadze chitukuko. Kuonjezera apo, pali njira yopangira lithiating pogwiritsa ntchito silicided lithiamu ufa ndi electrolytic lithiamu saline solution.

1 lithiamu zojambulazo za lithiamu lithiamu zojambulazo ndi njira yogwiritsira ntchito makina odziletsa. Kuthekera kwa zitsulo za lithiamu ndizomwe zimakhala zotsika kwambiri muzinthu zonse za electrode, ndipo pamene electrode yakuthupi ikukhudzana ndi zitsulo zazitsulo za lithiamu, electron imasunthidwa ku electrode yolakwika, pamodzi ndi Li + mu electrode yolakwika. Onjezani njira ya electrolytic pa silicon nanowire negative elekitirodi yokulirapo pa gawo lapansi lachitsulo chosapanga dzimbiri, kenako kukhudzana mwachindunji ndi zojambulazo zachitsulo za lithiamu.

Kuyesedwa koyipa kwa electrode pambuyo poyesedwa kwa lithiamu, ndipo kumapezeka kuti voteji yotseguka yopanda lithiamu ndi 1.55V, pa 0.01 mpaka 1.

00V woyamba 0.1c kutulutsidwa mphamvu lifiyamu enieni 3800mAh / g; silicon nanowire itatha kukweza Magetsi ndi 0.25V, chofukiza choyamba ndi 1600mAh / g.

Tini carbon negative electrode imakhudzana mwachindunji ndi zojambulazo za lithiamu zomwe zimalowetsedwa ndi electrolyte fluid. Kuyesa ndi semi-batri, kufananiza kosasinthika kwa malata a carbon pambuyo pa lithiamu kumachepetsedwa kuchoka pa 680 mAh / g mpaka 65mAh / g. Elekitirodi yoyipa imapanga batire lathunthu, ndipo ICE yoyesedwa pa 3.

1 mpaka 4.8V ili pafupi ndi 100% pa 3.1 mpaka 4.

8V, ndipo kuzungulira kumakhala kokhazikika, ndipo ntchito yokulitsa ndi yabwinoko. Ngakhale kuti imakhudzana mwachindunji ndi zojambulazo za lithiamu, electrode yoyipa isanayambe-lithiuming ingapezeke, koma digiri ya pre-lithiuming si yosavuta kulamulira molondola. Kuperewera kwa lithiation, sikutheka kukonza ICE; ndipo lithiamu yatha, ikhoza kupanga zitsulo za lithiamu zokutira pamwamba pa electrode yolakwika.

Z.Y.CAO neri Al pofuna kupititsa patsogolo chitetezo cha ma tonics a lithiamu zojambulazo, mapangidwe azinthu zogwira ntchito / polima / zitsulo za lithiamu zosanjikiza zitatu zosanjikiza ma elekitirodi akhoza kukhazikika mu mpweya wozungulira, wokwanira woipa wokonza.

Kapangidwe ka magawo atatu ndi: lithiamu wosanjikiza wokutidwa ndi polymethyl methacrylate zoteteza wosanjikiza ndi yogwira zinthu wosanjikiza pa lithiamu wosanjikiza ndi electrochemically waikamo zitsulo wosanjikiza lithiamu pa zojambula zamkuwa. 2 Okhazikika lifiyamu zitsulo ufa (SLMP) lifiyamu ufa zowonjezerapo akufuna Fumei, chitukuko cha SLMP ndi mkulu monga 3600mAh / g, ndi pamwamba yokutidwa ndi 2% kuti 5% lifiyamu carbonate, amene angakhale mu malo youma. ntchito.

Kugwiritsa ntchito SLMP pa electrode negative pre-lithiating, pali njira ziwiri: kuwonjezera, kapena kuwonjezera mwachindunji kumtunda woyipa. Propries zoipa ochiritsira, ntchito PVDF / NMP kapena SBR + CMC / deionized kachitidwe madzi, koma SLMP si yogwirizana ndi zosungunulira polar, zosungunulira sanali polar monga hexane, toluene, kotero sangathe pamodzi ochiritsira Direct Kuwonjezera pa zamkati. Ndi SBR-PVDF / toluene system, SLMP imatha kusakanikirana mwachindunji mu graphite elekitirodi slurry.

Pambuyo pa pre-lithium ya SLMP, pa 0.01 mpaka 1.00 V, 0.

05c, ICE ya batri idakwera kuchoka pa 90.6% mpaka 96.2%.

SLMP yokwezedwa mwachindunji pamalo owuma ndi osavuta kuposa kuyanika. The pakachitsulo mpweya nanotube negative elekitirodi ntchito pre-lifiyamu-mpweya mpweya nanotube negative elekitirodi, ndi kachigawo misa ndi 3% SlMP / toluene njira akutsikira pamwamba pa pakachitsulo-carbon nanotube, pambuyo toluene zosungunulira piritsi, yambitsa. Pambuyo pa pre-lithiuming, mphamvu yoyamba yosasinthika ya electrode yoyipa imachepetsedwa ndi 20% mpaka 40%.

3 silicided lithiamu ufa nano silikoni ufa kukula ndi yaing'ono, yabwino kwambiri kubalalitsidwa mu zoipa. Kuphatikiza apo, ili pakukulitsidwa, ndipo kusintha kwa voliyumu kuzungulira sikungakhudze kapangidwe ka electrode yonse. Pakalipano, pali kafukufuku wochepa pa silicided lithiamu lithiamu powder supplement, J.

ZHAO, etc. The semi-battery system imakhala ndi 0.01 mpaka 1.

00 V pa 0.01 mpaka 1.00V, ndipo mutatha kuwonjezera 15% ufa wa silicide, ICE wa silicon negative electrode akuwonjezeka kuchokera 76% mpaka 94%; onjezani 9% silicided lithiamu ufa wapakatikati wa carbon microspheres kuchokera ku 75% Onjezani mpaka 99%; onjezani 7% silicided lithiamu ufa graphite zoipa ICE yawonjezeka kuchokera 87% mpaka 99%.

4 Electrolytic lithiamu saline solution kuti apange lithiamu, kaya akugwiritsa ntchito lithiamu zojambulazo, SLMP kapena silicided lithiamu powder kuthandizira lithiamu,. Lifiyamu yachitsulo yapamwamba imakhala ndi mitengo yokwera, ntchito zapamwamba, ntchito yovuta, kusungirako ndi zoyendetsa zimafuna mtengo wapamwamba wotetezera. Ngati ndondomeko ya lithiamu sichiphatikizapo zitsulo za lithiamu, kupulumutsa mtengo, kupititsa patsogolo chitetezo.

The pakachitsulo akhoza kuchitidwa ndi electrolytic Li2SO4 njira amadzimadzi mu selo electrolytic, ndi elekitirodi nsembe kumizidwa mu waya wamkuwa mu Li2SO4, ndi lifiyamu anachita chikusonyezedwa chilinganizo (1): Chachiwiri, mmene mikangano yabwino ya njira yabwino tonifying ndi Kachulukidwe kakang'ono mkulu mphamvu zakuthupi anawonjezera pa zabwino elekitirodi seductive ndondomeko. Panthawi yolipiritsa, Li + imachotsedwa kuzinthu zamphamvu kwambiri, ndikuwonjezera kutayika kosasinthika kwa mtengo woyamba ndi kutulutsa. Pakali pano, zinthu monga zabwino elekitirodi lifiyamu zowonjezera makamaka: lithiamu pawiri, nanocomposite ndi bayinare lifiyamu pawiri zochokera kutembenuka anachita, etc.

1 lifiyamu pawiri amagwiritsa lifiyamu zinthu Li1 + XNi0.5Mn1.5O4 kubwezera sangasinthe mphamvu kutaya kwa Si-C | lini0.

5Mn1.5O4 batire yathunthu. Batire yokhala ndi ma elekitirodi osakanikirana ndi 75% pamlingo wosunga mphamvu wa 0.

33c pa 3.00 mpaka 4.78V, pomwe batire ikugwiritsa ntchito lini0 yoyera.

5 mn1.5O4 electrode positive ndi 51% yokha. Li2NiO2 itha kugwiritsidwanso ntchito ngati chowonjezera chowonjezera cha lithiamu, koma kukhazikika kwa mpweya kuli koyipa.

Aluminiyamu zotayidwa angagwiritsidwe ntchito kusintha Li2NiO2, synthesized Li2NiO2 zinthu TACHIMATA mu mpweya, ndipo lithiamu-lithiamu zotsatira zabwino kwambiri. 2 Nanocomposites yotengera kusintha kwa kusintha kwa lifiyamu ngakhale kuti lifiyamu pawiri yakwanitsa kuchita zinazake ngati chowonjezera cha lithiamu-lithium, mphamvu yoyamba ya lithiamu imakhalabe yochepa kwambiri. Kutengera nanocomposite ya kutembenuka mtima, kuchuluka kwa lithiamu kumatha kuperekedwa panthawi yoyamba kulipiritsa batire pa batire, ndipo zomwe lithiamu sizingachitike panthawi yotulutsa.

Y.m. SUN et al.

Anaphunzira M / Lithium oxide, M / fluorine, M / vulcanized (M = Co, Ni ndi Fe) ngati chowonjezera cha electrode lithiamu. Kupyolera mu kupanga nano-Co / lithiamu okusayidi gulu zinthu pa 50 mA / g wa 4.1 ~ 2.

Kuzungulira kwa 5V, mtengo woyamba ndi 619mAh / g, chiŵerengero chotulutsa ndi 10mAh / g; Pambuyo powonetsa 8h mumlengalenga wozungulira, chotsani Lithium ndi 51mAh / g yokha yocheperapo ya mtengo woyamba, ndipo pambuyo pa 2D, chiwerengero cha dehydric chikadali 418mAh / g, chomwe chili ndi kukhazikika kwa chilengedwe, chomwe chingakhale chogwirizana ndi kupanga. ya mabatire amalonda. Lithium fluorinated lithiamu lifiyamu zili mkulu, kukhazikika bwino, ndi kuthekera zabwino zimandilimbikitsa lifiyamu zakuthupi. Ndi m / LIF nanomaterials kukhazikitsidwa ndi kutembenuka anachita, akhoza kuthana ndi vuto la LIF madutsidwe ndi otsika ionic malangizo, mkulu electrochemical kuwola kuthekera, ndi zovulaza kwa kuwonongeka zinthu monga lithiamu fluoride ndi wapamwamba zabwino elekitirodi kusamvana zowonjezera.

Mphamvu zongoyerekeza za lithiamu sulfide zimafika 1166 mAh / g, koma monga chowonjezera cha lithiamu-lithium, pali mavuto ambiri omwe amayenera kuthetsedwa, monga kuyanjana, kusungunula, kukhazikika kwa chilengedwe, etc. , ma nanocomposites otengera kutembenuka mtima ndi otsalira popanda ntchito ya zitsulo oxides, fluorides, ndi sulfides, etc., kuchepetsa mphamvu kachulukidwe batire.

3 binary lithiamu pawiri binary lithiamu pawiri chiphunzitso ndi apamwamba kwambiri kuposa mphamvu. The ongolankhula enieni mphamvu Li2O2, Li2O ndi Li3N kufika 1168mAh / g, 1797mAh / g ndi 2309mAh / g motero, ndipo kokha pang'ono Kuwonjezera chofunika, ofanana ndi lifiyamu zotsatira chingapezeke. Mwachidziwitso, zotsalira za zinthu izi pambuyo pa lithiamu ndi O2, N2, etc.

, akhoza kupanga mpweya wotulutsidwa panthawi ya filimu ya SEI mu batri. Li3N yamalonda imaphwanyidwa kukhala ufa wokhala ndi tinthu tating'ono ta 1 mpaka 5 μm, yomwe imagwiritsidwa ntchito ngati chowonjezera cha lithiamu. Pansi pa semi-batri dongosolo, 1% ndi 2% Li3N ya LiCoO2 elekitirodi anawonjezedwa, ndipo woyamba mlandu chiŵerengero mphamvu 0.

1c pa 3.0 mpaka 4.2V inali 167.

6mAh / g ndi 178.4mAh / g motsatana, ndipo LiicoO2 yoyera idakwera ndi 18.0mAh / G, 28.

7mAh/g. Sakanizani malonda a Li2O2 ndi NCM, perekani kutayika kwa lithiamu panthawi yoyamba yolipiritsa zoipa za graphite. NCM mu electrode yosakanikirana imagwira ntchito ngati mphamvu ziwiri za zipangizo zogwira ntchito ndi zopangira.

Kuti athetse bwino kuwonongeka kwa Li2O2, 1% mphero ya mpira kwa 6 h inawonjezeredwa ku NCM yomwe inapezedwa mu electrode yabwino. Batire yonse ndi 2.75 ~ 4.

60V kulipira ndi kutulutsa, 0.3c ikhoza kusinthidwa kuposa 165.4mAh / g, kuposa 20.

5% ya inki | NCM batiri lathunthu. Mayeso adawonetsa kuti mpweya wotulutsidwa ndi Li2O2 umawola umagwiritsa ntchito Li + yochepa m'mabatire onse, zomwe zimapangitsa kuti batire yonseyi iwonongeke ndi kuwonjezera kwa Li2O2, koma mpweya utatha, mphamvuyo imatha kubwezeretsedwa. Kuyimbidwa koyamba kwa batri mu ndondomeko yeniyeni yopangira ikuchitika mu dongosolo lotseguka, ndipo imatulutsidwa kuti ipange filimu ya SEI ndi zochitika zina zomwe zimapangidwira asanasindikizidwe, kotero kuti zotsatira za kumasulidwa kwa O2 zikhoza kuchepetsedwa.

Chachitatu, ziganizo ndi ziyembekezo zikuyerekeza njira ziwiri za lithiamu-lithiamu, zowononga lithiamu-lithium-lithium reagents (lithiamu zojambulazo, lithiamu ufa, ndi silicide lithiamu lithiamu ufa) ali ndi mphamvu zambiri, koma ntchito yovuta, zofunikira zachilengedwe; kuwonjezera lithiamu mu elekitirodi zabwino Kukonzanso kwabwino kwa zowonjezera kumakhala kokhazikika pakukhazikika, ndipo kumagwirizana bwino ndi ukadaulo wopangira batire womwe ulipo. The kafukufuku m`tsogolo zoipa lithiamu-lifiyamu luso ayenera kuganizira bata, chitukuko ndi kupanga mafakitale a batire, ndi njira yosavuta luso, ndi wowonjezera zabwino ayenera kuganizira za chitukuko cha mkulu magazi lifiyamu mphamvu, ntchito yaing'ono. Dongosolo lowonjezera lokhala ndi kachulukidwe kakang'ono ka lithiamu.

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